This MACH Force XP Cat-Back exhaust system for the 2005-2009 Lexus GX470 with the V8-4.7L engine produced 9 horsepower and 14 pound x feet torque. This cat-back exhaust system is constructed of 2.5 inch mandrel-bent stainless steel and comes complete with a free-flowing muffler, tubing, OE-style bayonet hangers, premium band clamps and all hardware necessary for a hassle-free installation. The smooth curves and increased diameter of this exhaust system helps remove restriction and keeps exhaust gas flowing smoothly for increased horsepower and torque. This system is finished off with a high luster 304 stainless steel tip that creates the aggressive, high quality look your Lexus GX470 needs. Installation is a snap: This MACH Force XP use all factory mounting locations providing stability and a hassle-free installation. Leak-free seal: High quality OE-style flange and band clamps are used for a complete 360-degree sealing surface eliminating leak paths. Aggressive sound: A straight-through design, free-flowing stainless steel muffler is used to absorb high pitch tones producing a powerful sound and unleashing all available horsepower and torque out of your SUV. Perfect fit: OE-style bayonet hangers are used to maintain a stable pipe location during high vibration and high heat conditions. The bayonet tip holds the hanger bushing in place for an OE-style fit that does not change with time. Flow and performance: MACH Force XP exhaust systems are constructed of 2.5 inch mandrel bent stainless steel tubing for maximum flow. Smooth transition bends allow for low turbulence, increasing horsepower, torque and improving throttle response. All aFe exhaust systems are engineered and manufactured in Corona, California manufacturing facility.